Cofferdam retaining wall for flood control and bank protection
By adopting a combined structure of prefabricated piles and water stop components in the cofferdam retaining wall for flood control bank protection, the problem of insufficient bearing capacity and seismic isolation capacity of the traditional flood control embankment foundation is solved, and the efficient waterproof and compressive resistance of the retaining wall is achieved, ensuring safety in the riverside area.
Patent Information
- Application Number
- CN202421404940.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-19
- Publication Date
- 2025-04-22
- Estimated Expiration
- 2034-06-19
AI Technical Summary
The foundation bearing capacity and earthquake isolation capacity of traditional water conservancy flood control dams are poor, and they are prone to dam collapse and water source leakage, seriously threatening the safety of people, property and farmland in the river areas.
Flood-proofing and bank-protecting cofferdam retaining walls are used, including underwater concrete, retaining walls vertically fixed on the top of the underwater concrete, water stop components set between two adjacent retaining walls, and prefabricated piles embedded vertically at the bottom of the underwater concrete. The prefabricated piles are composed of the main pile body and the auxiliary pile body. The main pile body is embedded in the underwater concrete. The auxiliary pile body gradually shrinks from top to bottom, and the foundation bearing capacity and shock absorption capacity are enhanced through structures such as pile secondary reinforcement, pile main reinforcement, and connecting parts.
By enhancing the foundation's bearing capacity and shock absorption capacity, we ensure that the retaining wall has sufficient waterproof wave impact vibration ability and compressive and seepage resistance, so as to effectively resist floods and impacts and avoid flooding from affecting surrounding ecology.
Smart Images
Figure CN222782010U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of water conservancy and flood control facilities, and in particular relates to a cofferdam retaining wall for flood control and bank protection. Background Art
[0002] Water conservancy flood control dams are crucial infrastructure used to prevent river overflows and flooding. Their primary function is to resist flooding and protect people, property, and farmland along the river. Flood control dams must not only maintain sufficient pressure resistance and seepage resistance, but also adequate water-facing surface resistance to wave impact. Otherwise, repeated impact and erosion can easily cause damage, or even collapse, to the dam's soil.
[0003] Traditional water conservancy flood control dams have poor foundation bearing capacity and seismic isolation capabilities. In actual use, the roots of the dam body are prone to collapse due to long-term impact of water bodies. In addition, the anti-seepage ability at the gaps between the dam bodies is poor, and water leakage is prone to occur at the gaps, thereby accelerating the damage to the dam body and seriously threatening the safety of people, property and farmland in the riverside areas. Utility Model Content
[0004] The utility model provides a cofferdam retaining wall for flood control and bank protection, which solves the problem that traditional water conservancy flood control dams have poor foundation bearing capacity and seismic isolation capacity, and are prone to dam collapse, thus seriously threatening the safety of people, property and farmland in riverside areas.
[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a cofferdam retaining wall for flood control and bank protection, which includes:
[0006] underwater concrete;
[0007] A retaining wall, the retaining wall being vertically fixed on the top of the underwater concrete;
[0008] A water-stop assembly, the water-stop assembly being arranged between two adjacent retaining walls;
[0009] Precast piles are vertically embedded in the bottom of underwater concrete and arranged at intervals.
[0010] Optimally, the precast pile includes a main pile body and a secondary pile body integrally connected to one end of the main pile body, the main pile body is embedded in underwater concrete, and the secondary pile body is arranged to be gradually reduced from top to bottom.
[0011] Optimally, the prefabricated pile further comprises pile secondary reinforcement fixed in the main pile body and the secondary pile body in a shape-matched manner, pile main reinforcement penetrating the secondary pile body, a first connector connecting the pile secondary reinforcement, and a second connector connecting the pile secondary reinforcement and the pile main reinforcement.
[0012] Optimally, the first connecting member includes a first surrounding reinforcement disposed on the pile secondary reinforcement and a first buckle integrally connected to both ends of the first surrounding reinforcement, wherein the first buckle is buckled on the pile secondary reinforcement.
[0013] Optimally, the second connecting member includes a second surrounding reinforcement disposed around two adjacent pile secondary reinforcements and the pile main reinforcement, and a second buckle integrally connected to both ends of the second surrounding reinforcement, wherein the second buckle is buckled on the pile secondary reinforcement.
[0014] Optimally, the water-stop assembly includes an isolation joint arranged between two adjacent retaining walls, and a caulking layer and caulking glue arranged in the isolation joint, and the caulking glue is close to the water side.
[0015] Optimally, it also includes a water-facing portion inclined at the side of the retaining wall close to the water, a pedestal fixed on the top of the underwater concrete, and a compacted layer laid on the top of the pedestal, and the retaining wall is vertically fixed on the top of the pedestal.
[0016] Optimally, the caulking layer is polyethylene, and the caulking glue is polyurethane caulking glue.
[0017] Due to the application of the above technical solution, the utility model has the following advantages compared with the prior art:
[0018] The utility model discloses a cofferdam retaining wall for flood control and bank protection, which sets prefabricated piles with special structures at the bottom of the retaining wall to enhance the bearing capacity of the foundation and the shock isolation and vibration reduction capabilities, thereby ensuring that the water-facing part of the retaining wall has sufficient resistance to water wave impact and vibration. At the same time, under the waterproof effect of the water-stop component, the retaining wall has sufficient pressure resistance and anti-seepage capabilities, thereby achieving the effect of flood control and bank protection, helping to resist floods and impacts, and avoiding the impact of floods on the surrounding ecology. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a cross-sectional view of the utility model;
[0020] Figure 2 This is a cross-sectional view of the water-stop assembly of the utility model;
[0021] Figure 3 This is a cross-sectional view of the prefabricated pile of the utility model;
[0022] Figure 4 For this utility model Figure 3 Cross-sectional view of plane 1-1;
[0023] Figure 5 For this utility model Figure 3 Cross-sectional view of plane 2-2;
[0024] Figure 6 is a schematic diagram of the second connecting member of the present invention;
[0025] Figure 7 is a schematic diagram of the second connecting member of the present invention;
[0026] Description of reference numerals:
[0027] 1. Underwater concrete; 2. Capping platform; 3. Retaining wall; 4. Compacted layer; 5. Water-facing part; 6. Isolation joint; 7. Filling layer; 8. Caulking glue; 9. Precast pile; 10. Main pile body; 11. Auxiliary pile body; 13. Pile secondary reinforcement; 14. Pile main reinforcement; 15. First surrounding reinforcement; 16. First buckle; 17. Second surrounding reinforcement; 18. Second buckle. DETAILED DESCRIPTION
[0028] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.
[0029] like Figure 1 Figure 1 shows a cross-sectional view of a cofferdam retaining wall for flood control and revetment according to the present invention, comprising underwater concrete 1, a cap 2, a retaining wall 3, a compacted layer 4, a water-facing portion 5, a waterstop assembly, and precast piles 9. The underwater concrete 1 is cast in concrete, and the precast piles 9 are vertically embedded within the underwater concrete 1 to enhance the bearing capacity of the foundation and its seismic isolation and vibration reduction capabilities.
[0030] The cap 2 is fixed on the top of the underwater concrete 1, and the retaining wall 3 is fixed on the top of the cap 2. By setting the cap 2, the contact area with the underwater concrete 1 is increased, thereby improving the stability of the retaining wall 3. One side of the retaining wall 3 is the water side (i.e. Figure 1 The water-facing portion 5 is tilted and arranged on the side of the retaining wall 3 close to the water. Figure 1 From the perspective of , the retaining wall 3 and the water-facing part 5 form a right-angled trapezoid, the lower base of the right-angled trapezoid is close to the pedestal 2, and the upper base of the right-angled trapezoid is far away from the pedestal 2.
[0031] By relying on the inclined water-facing part 5, the root width of the retaining wall 3 can be increased, thereby increasing the contact area between the retaining wall 3 and the platform 2; and the water flow will partially press on the water-facing part 5, thereby acting on the retaining wall 3, further improving the stability of the retaining wall 3.
[0032] The compacted layer 4 is laid on the top of the pedestal 2 and is located on the side of the retaining wall 3 away from the water. The compacted layer 4 is formed by backfilling and rests on the pedestal 2 and the retaining wall 3, thereby improving the bearing capacity and stability of the pedestal 2 and the retaining wall 3.
[0033] In order to avoid the influence of thermal expansion and contraction on the retaining wall 3, the retaining wall 3 is not cast in one piece, but cast in sections, with an isolation gap 6 left between two adjacent retaining walls 3. Figure 2As shown, the caulking layer 7 (polyethylene) is filled in the isolation gap 6 between two adjacent retaining walls 3, thereby playing a role in water isolation. In addition, polyethylene has a certain viscosity, which can better bond the two adjacent retaining walls 3 and improve the stability of the retaining wall 3 structure.
[0034] Caulking glue 8 is placed in the isolation joint 6 between two adjacent retaining walls 3 and is located on the side of the caulking layer 7 (i.e., the side closest to the water). Caulking glue 8 is a polyurethane caulking glue, which provides the first water stop. Polyurethane caulking glue has high tensile and compression resistance, can adapt to various environmental changes, is not easy to crack or fall off, and maintains long-term use. It also has excellent waterproof properties, can effectively prevent water penetration, and protect the interior of the building from damage caused by moisture and mildew.
[0035] The precast piles 9 are vertically embedded in the underwater concrete 1 to enhance the bearing capacity of the foundation and the ability of seismic isolation and shock absorption. Figure 3 As described above, the prefabricated pile 9 includes a main pile body 10, a secondary pile body 11, a pile secondary reinforcement 13, a pile main reinforcement 14, a first connecting piece and a second connecting piece. Figure 3 The precast piles 9 are placed horizontally. During actual construction, the precast piles 9 are vertically embedded in the bottom of the underwater concrete 1 .
[0036] The main pile body 10 is embedded in the underwater concrete 1, and the auxiliary pile body 11 is integrally connected to one end of the main pile body 10 (i.e., the end of the main pile body 10 away from the underwater concrete 1). During actual construction, a hole is first drilled in the foundation structure, and then the precast pile 9 is lifted and installed into the pre-drilled hole (with the auxiliary pile body 11 facing the hole). After the precast pile 9 is driven, the gap between the top of the precast pile 9 and the hole is sealed (for example, by filling with cement mortar) to enhance the stability and durability of the pile.
[0037] like Figure 3 As shown, the auxiliary pile body 11 gradually decreases in size from top to bottom, which can play a guiding role during piling and ensure a smooth piling process. Figure 3 The auxiliary pile body 11 is in the shape of a prism, the upper base of the prism-shaped auxiliary pile body 11 is away from the main pile body 10 , and the lower base of the prism-shaped auxiliary pile body 11 is connected to the main pile body 10 .
[0038] The shape of the auxiliary pile body 11 is not limited to a prism shape, but can also be a truncated cone shape, with the upper base of the truncated cone-shaped auxiliary pile body 11 away from the main pile body 10 and the lower base of the truncated cone-shaped auxiliary pile body 11 connected to the main pile body 10. Therefore, as long as the auxiliary pile body 11 gradually decreases in size from top to bottom, it can guide the main pile body 10.
[0039] In order to reduce the weight of the precast pile 9 and facilitate transportation and the smooth progress of the piling process, the interior of the precast pile 9 is hollow (a plurality of groups of injection holes are provided on the outer peripheral surface of the precast pile 9. After the precast pile 9 is driven, these holes can be used to conveniently pour concrete into the entire pipe pile. This can facilitate the construction workers to quickly pour concrete, improve the construction efficiency of the project, and at the same time improve the bearing capacity and stability of the precast pile 9).
[0040] like Figure 5 As shown, the pile auxiliary reinforcement 13 is arranged on the inner side of the hollow structure of the main pile body 10 to improve the structural strength of the main pile body 10 and prevent the main pile body 10 from cracking during transportation. At the same time, after the pouring and piling are completed, the pile auxiliary reinforcement 13 can enhance the structural strength of the main pile body 10 to enhance the bearing capacity of the foundation and the seismic isolation and shock absorption capabilities.
[0041] Since the main pile body 10 is rectangular, the pile auxiliary reinforcements 13 are located at the four inner corners of the main pile body 10 and have the same length as the main pile body 10. The first connecting member includes a first surrounding reinforcement 15 and a first buckle 16 for fixing and connecting the four pile auxiliary reinforcements 13.
[0042] like Figure 5 As shown, the first reinforcement 15 is wound around the four pile secondary reinforcements 13, and the two ends of the first reinforcement 15 are integrally connected with a first buckle 16, which is buckled on one of the pile secondary reinforcements 13. The first reinforcement 15 and the pile secondary reinforcement 13 are tied together by wire, and then cast into a precast pile 9 through a casting process.
[0043] like Figure 4 As shown, the main pile reinforcement 14 is fixed to the secondary pile reinforcement 13 and extends through the secondary pile body 11. The main pile reinforcement 14 cooperates with the tapered secondary pile body 11 to reduce the chance of pile breakage during piling and increase the pile's ability to penetrate the soil during driving. The second connecting member includes a second circumferential reinforcement 17 and a second buckle 18, which are used to securely connect the secondary pile reinforcement 13 and the main pile reinforcement 14.
[0044] like Figure 6 、 7 As shown, the pile main reinforcement 14 is located at the center of the four pile secondary reinforcements 13, the second surrounding reinforcement 17 is in a right angle shape, and the second buckle 18 is integrally connected to the two ends of the second surrounding reinforcement 17 and buckled on the pile secondary reinforcement 13. The second surrounding reinforcement 17 is wound around two adjacent pile secondary reinforcements 13 and the pile main reinforcement 14, and the second surrounding reinforcement 17 is tied together with the pile secondary reinforcement 13 and the pile main reinforcement 14 by wire. Therefore, four sets of second surrounding reinforcements 17 are required to be fixedly connected between the pile main reinforcement 14 and the four pile secondary reinforcements 13 (as shown in FIG. Figure 7 shown).
[0045] By providing the first and second connectors, the structural strength and connection stability between the pile secondary reinforcement 13 and the pile primary reinforcement 14 can be effectively improved, thereby improving the structural strength of the prefabricated pile 9 and enhancing the bearing capacity and seismic isolation and shock absorption capabilities of the foundation.
[0046] The construction process of the cofferdam retaining wall for flood control and bank protection of the utility model is as follows:
[0047] During actual construction, a hole is first drilled on the foundation structure, and then the precast pile 9 is lifted and installed into the pre-drilled hole (with the auxiliary pile body 11 facing the hole). After the precast pile 9 is driven, the gap between the top of the precast pile 9 and the hole is sealed (such as filling with cement mortar) to enhance the stability and durability of the pile.
[0048] Concrete is poured on top of the precast piles 9 to form underwater concrete 1. After the underwater concrete 1 solidifies and takes shape, concrete is poured on top to form the pedestal 2 and retaining wall 3. To avoid the impact of thermal expansion and contraction on the retaining wall 3, the retaining wall 3 is not cast in one piece, but in sections. An isolation gap 6 is left between two adjacent retaining walls 3. Finally, a caulking layer 7 and a caulking glue 8 are set in the isolation gap 6. The overall structure is more stable and reliable. The special structure of the precast piles 9 enhances the bearing capacity of the foundation and the isolation and shock absorption capabilities. At the same time, under the waterproof effect of the water-stop component, it can play a good role in flood prevention and bank protection, avoiding the impact of floods on the surrounding ecology.
[0049] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those familiar with the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications based on the spirit of the present invention are intended to be included in the scope of protection of the present invention.
Claims
1. A cofferdam retaining wall for flood control and bank protection, characterized in that it include: Underwater concrete (1); A retaining wall (3), wherein the retaining wall (3) is vertically fixed on the top of the underwater concrete (1); A water-stop component, the water-stop component being arranged between two adjacent retaining walls (3); Prefabricated piles (9), wherein the prefabricated piles (9) are vertically embedded in the bottom of the underwater concrete (1) and are arranged at intervals.
2. A cofferdam retaining wall for flood control and bank protection according to claim 1, characterized in that: The prefabricated pile (9) comprises a main pile body (10) and a secondary pile body (11) integrally connected to one end of the main pile body (10); the main pile body (10) is embedded in underwater concrete (1); and the secondary pile body (11) is arranged to gradually shrink from top to bottom.
3. A cofferdam retaining wall for flood control and bank protection according to claim 2, characterized in that: The prefabricated pile (9) further comprises a pile secondary reinforcement (13) fixed in a shape-matched manner in the main pile body (10) and the secondary pile body (11), a pile main reinforcement (14) penetrating the secondary pile body (11), a first connecting member connecting the pile secondary reinforcement (13), and a second connecting member connecting the pile secondary reinforcement (13) and the pile main reinforcement (14).
4. A cofferdam retaining wall for flood control and bank protection according to claim 3, characterized in that: The first connecting member comprises a first surrounding rib (15) arranged around the pile secondary rib (13) and a first buckle (16) integrally connected to both ends of the first surrounding rib (15); the first buckle (16) is buckled on the pile secondary rib (13).
5. The cofferdam retaining wall for flood control and bank protection according to claim 3 is characterized by: The second connecting member comprises a second surrounding reinforcement (17) arranged around two adjacent pile secondary reinforcements (13) and the pile main reinforcement (14), and a second buckle (18) integrally connected to both ends of the second surrounding reinforcement (17), wherein the second buckle (18) is buckled on the pile secondary reinforcement (13).
6. A cofferdam retaining wall for flood control and bank protection according to claim 2, characterized in that: The water-stop assembly comprises an isolation joint (6) arranged between two adjacent retaining walls (3), and a caulking layer (7) and a caulking glue (8) arranged in the isolation joint (6), wherein the caulking glue (8) is close to the water side.
7. The cofferdam retaining wall for flood control and bank protection according to claim 1, characterized in that: It also includes a water-facing portion (5) obliquely arranged on the side of the retaining wall (3) close to the water, a cap (2) fixed on the top of the underwater concrete (1), and a compacted layer (4) laid on the top of the cap (2); the retaining wall (3) is vertically fixed on the top of the cap (2).
8. The cofferdam retaining wall for flood control and bank protection according to claim 6, characterized in that: The caulking layer (7) is polyethylene, and the caulking glue (8) is polyurethane caulking glue.